Adding Content Sources and Federated Locations in Search
SharePoint has a powerful enterprise search engine. Information from all across enterprise can be made available and viewable to users. This video shows how to index content sources (it demoes SharePoint-Videos.com as a source) and also how to setup federated search sources (demos results from YouTube within a web part)
An .osdx file is needed for the functionality presented to work. Click here to download the file.